You are examining a patient with Ca endometrium and you find that the inguinal lymph nodes are involved. What is the stage of the disease?
**Core Concept**
The staging of endometrial cancer involves assessing the extent of tumor spread, including the presence of lymph node metastasis. The FIGO (International Federation of Gynecology and Obstetrics) staging system is commonly used for this purpose.
**Why the Correct Answer is Right**
Inguinal lymph node involvement in endometrial cancer indicates a distant metastasis, which is classified as stage IV disease according to the FIGO staging system. This is because inguinal lymph nodes are located outside of the pelvis and are not typically involved in the primary spread of endometrial cancer. The correct staging of endometrial cancer with inguinal lymph node involvement is IVB, as it represents a distant metastasis without involvement of other organs.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect, as stage I disease is limited to the uterus and does not involve lymph nodes.
**Option B:** Incorrect, as stage II disease involves the uterus and cervix but does not typically involve distant lymph nodes.
**Option C:** Incorrect, as stage III disease involves the pelvis and may involve lymph nodes within the pelvis, but not typically inguinal lymph nodes.
**Clinical Pearl / High-Yield Fact**
Inguinal lymph node involvement in endometrial cancer is a poor prognostic sign and often indicates a more advanced stage of disease. It is essential to consider distant metastasis when assessing the stage of endometrial cancer.
**Correct Answer: D. IVB**